Weeds

CHAMPAIGN, Ill. - When the weed killer Roundup was introduced in the 1970s, it proved it could kill nearly any plant while still being safer than many other herbicides, and it allowed farmers to give up harsher chemicals and reduce tilling that can contribute to erosion.

BISMARCK, N.D. - Booming oil activity in western North Dakota in recent years has boosted the state's economy.